LTR Programming Problem

[pbouc]

I have a PRO-95 and have added LTR frequencies for some Oakland County systems. I have programmed the Known LCN's in order and have used the Scancat-Lite software. I have not been able to pick up any transmissions at all. One of the System Names is DeltaCom UHF system. The type is LTR Standard. The PRO-95 manual states that an offset frequency must be programmed as well as step. I am at a loss. Has anyone had any issues with this? Can someone help or guide me to an area where I can learn more?

Thanks

Paul

 

[crayon]

Paul,

The Pro 95 does not trunk track LTR systems, you can only scan the system in conventional mode.

 

[pbouc]

I should have read previous posts!

Thanks, I found the answer 5 minutes after I posted this message. The lesson learned is I should read previous posts! The PRO-95 manual tells how to program Motorola Trunking Systems (UHF Lo). So I take it LTR and Motorola systems are different? What does LTR stand for?

 

[crayon]

Re: I should have read previous posts!

Thanks, I found the answer 5 minutes after I posted this message. The lesson learned is I should read previous posts!

no problem!!

So I take it LTR and Motorola systems are different?

yep.

What does LTR stand for?

http://www.google.com/search?hl=en&q=ltr+trunked+systems

 

[INDY72]

Logic Trunking Radio

It uses on most forms of LTR- A subaudible data burst instead of a control channel to trunk. It comes in four forms.

LTR Standard
LTR Passport
LTR Mixed (Which is an Standard LTR system with Passport in usage on the same system)
LTR Multinet (Which is the only LTR type that does have a CC sorta like an Motorola or M/A-Com type TRS.

LTR Standard can be trunk tracked by scanners designed for it.
LTR Passport can not be trunk tracked with a scanner, only monitored conventionally, though using a Discriminator tapped scanner running through a data slicer to an PC, using LTRDump/LTRTrunk software can be trunk tracked on the PC.
LTR Multinet can not be trunk tracked by iether of these methods as far as I know.

On a Standard LTR system you will hear the data bursts every 8 to 12 seconds. It sounds like a brief key up with no voice.
On an Passport LTR system, the bursts are every 2 to 4 seconds, and to monitor on a scanner you must put all the repeaters in with NO delays.... (For a psuedo trunking method on Passport see the other threads in the LTR Forums...)
I am not familiar with how to monitor Multinet LTR, and there are none near me.

 

[EricCottrell]

Logic Trunking Radio

LTR Passport can not be trunk tracked with a scanner, only monitored conventionally, though using a Discriminator tapped scanner running through a data slicer to an PC, using LTRDump/LTRTrunk software can be trunk tracked on the PC.
LTR Multinet can not be trunk tracked by iether of these methods as far as I know.

LTRDump/LTRTrunk can monitor and trunk track LTR Multinet.

73 Eric

 

[cg]

Also LTR-Net. The LTR-Net sites around me have a channel that is transmitting 24/7 and 3 others for traffic. Eric's LTRTrunk will work on it.

Chris

Found this online:

LTR®-Net Protocol

LTR®-Net protocol provides the next generation analog trunked radio protocol. The LTR®-Net protocol was designed by the original designers of the LTR® protocol (E.F.Johnson) as well as the Multi-Net® protocol. LTR®-Net protocol enables the system to provide wide-area dispatching, UID calling capabilities, system security and over-the-air management, while maintaining compatibility with current LTR® equipment.

LTR®-Net Over-the-Air Compatibility with LTR®

The LTR®-Net protocol is completely compatible with the existing LTR® subscribers and repeaters. The LTR®-Net Group ID Call word is the standard word that is used for group calling. The group IDs range from 1 to 239. This is the same as the standard LTR® data word. This allows an LTR®-Net subscriber and an LTR® subscriber to talk via a single talk group on a single channel.

LTR®-Net radios operate the same as existing LTR® radios on an existing LTR® site. This allows a system operator to purchase LTR®-Net subscriber units and integrate the purchased subscribers on an existing LTR® system. The system operator would maintain the option to upgrade the system to an LTR®-Net system and allow these subscribers to have full LTR®-Net capabilities.

Existing LTR® radios will operate on an LTR®-Net system. For example, a five-channel LTR® site could be upgraded to an LTR®-Net site. The existing LTR® radios would continue to operate as before with full use of all five channels without any modifications to the subscriber units. This allows the system operator to integrate existing LTR® users into the LTR®-Net system.

LTR®-Net allows a system operator to complete the technology upgrade by integration vs. migration. Transcrypt is very sensitive to the cost of the installed LTR® infrastructure and subscriber units, and understands the need for integration to a new technology to allow system operators to continue to benefit from the existing LTR® subscriber base.